From 4352b8aee98005853aa63f57d6377282de17a33f Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sun, 23 Aug 2026 13:28:57 -0700 Subject: Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux Pull I3C updates from Alexandre Belloni: "A new driver this cycle, for the AMD AXI I3C controller. There are also new features such as IBI wakeup support, SETAASA device discovery and ACPI support for the the DAA methods, meaning we can now communicate with the SPD devices on DDR5 modules. New driver: - AMD AXI I3C master controller Subsystem: - I3C Common Command Code (CCC) handling improvements, especially around GET CCCs - SETAASA device discovery support - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as well as I2C devices on I3C bus - IBI-based wakeup support Drivers: - dw: SETAASA support - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C controller support, PIO queue management support for HCI v1.2 - renesas: improve suspend to RAM support, add runtime PM support" * tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits) i3c: dw: reduce do_daa time if there's no client i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2 i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode i3c: dw: rename "pclk" to "apb" to match dt-binding i3c: dw: make struct dw_i3c_cmd smaller i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding i3c: renesas: Don't register devices when ENTDAA times out i3c: master: dw-i3c-master: fix OD timing for first broadcast i3c: mipi-i3c-hci: Advertise IBI wakeup capability i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev() i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI i3c: master: Reject IBI requests from non-IBI-capable devices i3c: master: Add helper to query bus wakeup requirements i3c: master: Report wakeup events for IBIs i3c: master: Support IBI-based wakeup capability i3c: master: Fix potential UAF in i3c_device_match() i3c: master: Fix potential UAF in i3c_device_uevent() i3c: Make dev->desc locking assumptions explicit i3c: master: Fix use-after-free of master->this ... --- fs/ntfs/ea.c | 957 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 957 insertions(+) create mode 100644 fs/ntfs/ea.c (limited to 'fs/ntfs/ea.c') diff --git a/fs/ntfs/ea.c b/fs/ntfs/ea.c new file mode 100644 index 000000000..0cd192752 --- /dev/null +++ b/fs/ntfs/ea.c @@ -0,0 +1,957 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Pocessing of EA's + * + * Part of this file is based on code from the NTFS-3G. + * + * Copyright (c) 2014-2021 Jean-Pierre Andre + * Copyright (c) 2025 LG Electronics Co., Ltd. + */ + +#include +#include +#include +#include + +#include "layout.h" +#include "attrib.h" +#include "index.h" +#include "dir.h" +#include "ea.h" + +static int ntfs_write_ea(struct ntfs_inode *ni, __le32 type, char *value, s64 ea_off, + s64 ea_size, bool need_truncate) +{ + struct inode *ea_vi; + int err = 0; + s64 written; + + ea_vi = ntfs_attr_iget(VFS_I(ni), type, AT_UNNAMED, 0); + if (IS_ERR(ea_vi)) + return PTR_ERR(ea_vi); + + written = ntfs_inode_attr_pwrite(ea_vi, ea_off, ea_size, value, false); + if (written != ea_size) + err = -EIO; + else { + struct ntfs_inode *ea_ni = NTFS_I(ea_vi); + + if (need_truncate && ea_ni->data_size > ea_off + ea_size) + ntfs_attr_truncate(ea_ni, ea_off + ea_size); + mark_mft_record_dirty(ni); + } + + iput(ea_vi); + return err; +} + +static int ntfs_ea_lookup(char *ea_buf, s64 ea_buf_size, const char *name, + int name_len, s64 *ea_offset, s64 *ea_size) +{ + const struct ea_attr *p_ea; + size_t actual_size; + loff_t offset, p_ea_size; + unsigned int next; + + offset = 0; + do { + if (ea_buf_size - offset < sizeof(struct ea_attr)) + break; + + p_ea = (const struct ea_attr *)&ea_buf[offset]; + next = le32_to_cpu(p_ea->next_entry_offset); + p_ea_size = next ? next : (ea_buf_size - offset); + + if (p_ea_size < sizeof(struct ea_attr) || + offset + p_ea_size > ea_buf_size) + break; + + if ((s64)p_ea->ea_name_length + 1 > + p_ea_size - offsetof(struct ea_attr, ea_name)) + break; + + actual_size = ALIGN(struct_size(p_ea, ea_name, 1 + p_ea->ea_name_length + + le16_to_cpu(p_ea->ea_value_length)), 4); + if (actual_size > p_ea_size) + break; + + if (p_ea->ea_name_length == name_len && + !memcmp(p_ea->ea_name, name, name_len)) { + *ea_offset = offset; + *ea_size = next ? next : actual_size; + + if (ea_buf_size < *ea_offset + *ea_size) + goto out; + + return 0; + } + offset += next; + } while (next > 0 && offset < ea_buf_size); + +out: + return -ENOENT; +} + +/* + * Return the existing EA + * + * The EA_INFORMATION is not examined and the consistency of the + * existing EA is not checked. + * + * If successful, the full attribute is returned unchanged + * and its size is returned. + * If the designated buffer is too small, the needed size is + * returned, and the buffer is left unchanged. + * If there is an error, a negative value is returned and errno + * is set according to the error. + */ +static int ntfs_get_ea(struct inode *inode, const char *name, size_t name_len, + void *buffer, size_t size) +{ + struct ntfs_inode *ni = NTFS_I(inode); + const struct ea_attr *p_ea; + char *ea_buf; + s64 ea_off, ea_size, all_ea_size, ea_info_size; + int err; + u32 ea_info_qlen; + u16 ea_value_len; + struct ea_information *p_ea_info; + + if (!NInoHasEA(ni)) + return -ENODATA; + + p_ea_info = ntfs_attr_readall(ni, AT_EA_INFORMATION, NULL, 0, + &ea_info_size); + if (!p_ea_info || ea_info_size != sizeof(struct ea_information)) { + kvfree(p_ea_info); + return -ENODATA; + } + + ea_info_qlen = le32_to_cpu(p_ea_info->ea_query_length); + kvfree(p_ea_info); + + ea_buf = ntfs_attr_readall(ni, AT_EA, NULL, 0, &all_ea_size); + if (!ea_buf) + return -ENODATA; + + if (ea_info_qlen > all_ea_size) { + err = -EIO; + goto free_ea_buf; + } + + err = ntfs_ea_lookup(ea_buf, ea_info_qlen, name, name_len, &ea_off, + &ea_size); + if (!err) { + p_ea = (struct ea_attr *)&ea_buf[ea_off]; + ea_value_len = le16_to_cpu(p_ea->ea_value_length); + if (!buffer) { + kvfree(ea_buf); + return ea_value_len; + } + + if (ea_value_len > size) { + err = -ERANGE; + goto free_ea_buf; + } + + memcpy(buffer, &p_ea->ea_name[p_ea->ea_name_length + 1], + ea_value_len); + kvfree(ea_buf); + return ea_value_len; + } + + err = -ENODATA; +free_ea_buf: + kvfree(ea_buf); + return err; +} + +static inline int ea_packed_size(const struct ea_attr *p_ea) +{ + /* + * 4 bytes for header (flags and lengths) + name length + 1 + + * value length. + */ + return 5 + p_ea->ea_name_length + le16_to_cpu(p_ea->ea_value_length); +} + +/* + * Set a new EA, and set EA_INFORMATION accordingly + * + * This is roughly the same as ZwSetEaFile() on Windows, however + * the "offset to next" of the last EA should not be cleared. + * + * Consistency of the new EA is first checked. + * + * EA_INFORMATION is set first, and it is restored to its former + * state if setting EA fails. + */ +static int ntfs_set_ea(struct inode *inode, const char *name, size_t name_len, + const void *value, size_t val_size, int flags, + __le16 *packed_ea_size) +{ + struct ntfs_inode *ni = NTFS_I(inode); + struct ea_information *p_ea_info = NULL; + int ea_packed, err = 0; + struct ea_attr *p_ea; + u32 ea_info_qsize = 0; + char *ea_buf = NULL; + size_t new_ea_size = ALIGN(struct_size(p_ea, ea_name, 1 + name_len + val_size), 4); + s64 ea_off, ea_info_size, all_ea_size, ea_size; + + if (name_len > 255) + return -ENAMETOOLONG; + + if (ntfs_attr_exist(ni, AT_EA_INFORMATION, AT_UNNAMED, 0)) { + p_ea_info = ntfs_attr_readall(ni, AT_EA_INFORMATION, NULL, 0, + &ea_info_size); + if (!p_ea_info || ea_info_size != sizeof(struct ea_information)) + goto out; + + ea_buf = ntfs_attr_readall(ni, AT_EA, NULL, 0, &all_ea_size); + if (!ea_buf) { + ea_info_qsize = 0; + kvfree(p_ea_info); + goto create_ea_info; + } + + ea_info_qsize = le32_to_cpu(p_ea_info->ea_query_length); + } else { +create_ea_info: + p_ea_info = kzalloc(sizeof(struct ea_information), GFP_NOFS); + if (!p_ea_info) + return -ENOMEM; + + ea_info_qsize = 0; + err = ntfs_attr_add(ni, AT_EA_INFORMATION, AT_UNNAMED, 0, + (char *)p_ea_info, sizeof(struct ea_information)); + if (err) + goto out; + + if (ntfs_attr_exist(ni, AT_EA, AT_UNNAMED, 0)) { + err = ntfs_attr_remove(ni, AT_EA, AT_UNNAMED, 0); + if (err) + goto out; + } + + goto alloc_new_ea; + } + + if (ea_info_qsize > all_ea_size) { + err = -EIO; + goto out; + } + + err = ntfs_ea_lookup(ea_buf, ea_info_qsize, name, name_len, &ea_off, + &ea_size); + if (ea_info_qsize && !err) { + if (flags & XATTR_CREATE) { + err = -EEXIST; + goto out; + } + + p_ea = (struct ea_attr *)(ea_buf + ea_off); + + if (val_size && + le16_to_cpu(p_ea->ea_value_length) == val_size && + !memcmp(p_ea->ea_name + p_ea->ea_name_length + 1, value, + val_size)) + goto out; + + le16_add_cpu(&p_ea_info->ea_length, 0 - ea_packed_size(p_ea)); + + if (p_ea->flags & NEED_EA) + le16_add_cpu(&p_ea_info->need_ea_count, -1); + + memmove((char *)p_ea, (char *)p_ea + ea_size, ea_info_qsize - (ea_off + ea_size)); + ea_info_qsize -= ea_size; + p_ea_info->ea_query_length = cpu_to_le32(ea_info_qsize); + + err = ntfs_write_ea(ni, AT_EA_INFORMATION, (char *)p_ea_info, 0, + sizeof(struct ea_information), false); + if (err) + goto out; + + err = ntfs_write_ea(ni, AT_EA, ea_buf, 0, ea_info_qsize, true); + if (err) + goto out; + + if ((flags & XATTR_REPLACE) && !val_size) { + /* Remove xattr. */ + goto out; + } + } else { + if (flags & XATTR_REPLACE) { + err = -ENODATA; + goto out; + } + } + kvfree(ea_buf); + +alloc_new_ea: + ea_buf = kzalloc(new_ea_size, GFP_NOFS); + if (!ea_buf) { + err = -ENOMEM; + goto out; + } + + /* + * EA and REPARSE_POINT compatibility not checked any more, + * required by Windows 10, but having both may lead to + * problems with earlier versions. + */ + p_ea = (struct ea_attr *)ea_buf; + memcpy(p_ea->ea_name, name, name_len); + p_ea->ea_name_length = name_len; + p_ea->ea_name[name_len] = 0; + memcpy(p_ea->ea_name + name_len + 1, value, val_size); + p_ea->ea_value_length = cpu_to_le16(val_size); + p_ea->next_entry_offset = cpu_to_le32(new_ea_size); + + ea_packed = le16_to_cpu(p_ea_info->ea_length) + ea_packed_size(p_ea); + p_ea_info->ea_length = cpu_to_le16(ea_packed); + p_ea_info->ea_query_length = cpu_to_le32(ea_info_qsize + new_ea_size); + + if (ea_packed > 0xffff || + ntfs_attr_size_bounds_check(ni->vol, AT_EA, new_ea_size)) { + err = -EFBIG; + goto out; + } + + /* + * no EA or EA_INFORMATION : add them + */ + if (!ntfs_attr_exist(ni, AT_EA, AT_UNNAMED, 0)) { + err = ntfs_attr_add(ni, AT_EA, AT_UNNAMED, 0, (char *)p_ea, + new_ea_size); + if (err) + goto out; + } else { + err = ntfs_write_ea(ni, AT_EA, (char *)p_ea, ea_info_qsize, + new_ea_size, false); + if (err) + goto out; + } + + err = ntfs_write_ea(ni, AT_EA_INFORMATION, (char *)p_ea_info, 0, + sizeof(struct ea_information), false); + if (err) + goto out; + + if (packed_ea_size) + *packed_ea_size = p_ea_info->ea_length; + mark_mft_record_dirty(ni); +out: + if (ea_info_qsize > 0) + NInoSetHasEA(ni); + else + NInoClearHasEA(ni); + + kvfree(ea_buf); + kvfree(p_ea_info); + + return err; +} + +/* + * Check for the presence of an EA "$LXDEV" (used by WSL) + * and return its value as a device address + */ +int ntfs_ea_get_wsl_inode(struct inode *inode, dev_t *rdevp, unsigned int flags) +{ + int err; + __le32 v; + + if (!(flags & NTFS_VOL_UID)) { + /* Load uid to lxuid EA */ + err = ntfs_get_ea(inode, "$LXUID", sizeof("$LXUID") - 1, &v, + sizeof(v)); + if (err < 0) + return err; + if (err != sizeof(v)) + return -EIO; + i_uid_write(inode, le32_to_cpu(v)); + } + + if (!(flags & NTFS_VOL_GID)) { + /* Load gid to lxgid EA */ + err = ntfs_get_ea(inode, "$LXGID", sizeof("$LXGID") - 1, &v, + sizeof(v)); + if (err < 0) + return err; + if (err != sizeof(v)) + return -EIO; + i_gid_write(inode, le32_to_cpu(v)); + } + + /* Load mode to lxmod EA */ + err = ntfs_get_ea(inode, "$LXMOD", sizeof("$LXMOD") - 1, &v, sizeof(v)); + if (err == sizeof(v)) { + inode->i_mode = le32_to_cpu(v); + } else { + /* Everyone gets all permissions. */ + inode->i_mode |= 0777; + } + + /* Load mode to lxdev EA */ + err = ntfs_get_ea(inode, "$LXDEV", sizeof("$LXDEV") - 1, &v, sizeof(v)); + if (err == sizeof(v)) + *rdevp = le32_to_cpu(v); + err = 0; + + return err; +} + +int ntfs_ea_set_wsl_inode(struct inode *inode, dev_t rdev, __le16 *ea_size, + unsigned int flags) +{ + __le32 v; + int err = 0; + + if (ea_size) + *ea_size = 0; + + if (flags & NTFS_EA_UID) { + /* Store uid to lxuid EA */ + v = cpu_to_le32(i_uid_read(inode)); + err = ntfs_set_ea(inode, "$LXUID", sizeof("$LXUID") - 1, &v, + sizeof(v), 0, ea_size); + if (err) + return err; + } + + if (flags & NTFS_EA_GID) { + /* Store gid to lxgid EA */ + v = cpu_to_le32(i_gid_read(inode)); + err = ntfs_set_ea(inode, "$LXGID", sizeof("$LXGID") - 1, &v, + sizeof(v), 0, ea_size); + if (err) + return err; + } + + if (flags & NTFS_EA_MODE) { + /* Store mode to lxmod EA */ + v = cpu_to_le32(inode->i_mode); + err = ntfs_set_ea(inode, "$LXMOD", sizeof("$LXMOD") - 1, &v, + sizeof(v), 0, ea_size); + if (err) + return err; + } + + if (rdev) { + v = cpu_to_le32(rdev); + err = ntfs_set_ea(inode, "$LXDEV", sizeof("$LXDEV") - 1, &v, sizeof(v), + 0, ea_size); + } + + return err; +} + +ssize_t ntfs_listxattr(struct dentry *dentry, char *buffer, size_t size) +{ + struct inode *inode = d_inode(dentry); + struct ntfs_inode *ni = NTFS_I(inode); + const struct ea_attr *p_ea; + s64 offset, ea_buf_size, ea_info_size; + s64 ea_size; + u32 next; + int err = 0; + u32 ea_info_qsize; + char *ea_buf = NULL; + ssize_t ret = 0; + struct ea_information *ea_info; + + if (!NInoHasEA(ni)) + return 0; + + mutex_lock(&NTFS_I(inode)->mrec_lock); + ea_info = ntfs_attr_readall(ni, AT_EA_INFORMATION, NULL, 0, + &ea_info_size); + if (!ea_info || ea_info_size != sizeof(struct ea_information)) + goto out; + + ea_info_qsize = le32_to_cpu(ea_info->ea_query_length); + + ea_buf = ntfs_attr_readall(ni, AT_EA, NULL, 0, &ea_buf_size); + if (!ea_buf) + goto out; + + if (ea_info_qsize > ea_buf_size || ea_info_qsize == 0) + goto out; + + offset = 0; + do { + if (ea_info_qsize - offset < sizeof(struct ea_attr)) { + err = -EIO; + goto out; + } + + p_ea = (const struct ea_attr *)&ea_buf[offset]; + next = le32_to_cpu(p_ea->next_entry_offset); + ea_size = next ? next : (ea_info_qsize - offset); + + if (ea_size < sizeof(struct ea_attr) || + offset + ea_size > ea_info_qsize) { + err = -EIO; + goto out; + } + + if ((int)p_ea->ea_name_length + 1 > + ea_size - offsetof(struct ea_attr, ea_name)) { + err = -EIO; + goto out; + } + + if (buffer) { + if (ret + p_ea->ea_name_length + 1 > size) { + err = -ERANGE; + goto out; + } + + memcpy(buffer + ret, p_ea->ea_name, p_ea->ea_name_length); + buffer[ret + p_ea->ea_name_length] = 0; + } + + ret += p_ea->ea_name_length + 1; + offset += ea_size; + } while (next > 0 && offset < ea_info_qsize); + +out: + mutex_unlock(&NTFS_I(inode)->mrec_lock); + kvfree(ea_info); + kvfree(ea_buf); + + return err ? err : ret; +} + +// clang-format off +#define SYSTEM_DOS_ATTRIB "system.dos_attrib" +#define SYSTEM_NTFS_ATTRIB "system.ntfs_attrib" +#define SYSTEM_NTFS_ATTRIB_BE "system.ntfs_attrib_be" +// clang-format on + +static int ntfs_getxattr(const struct xattr_handler *handler, + struct dentry *unused, struct inode *inode, const char *name, + void *buffer, size_t size) +{ + struct ntfs_inode *ni = NTFS_I(inode); + int err; + + if (NVolShutdown(ni->vol)) + return -EIO; + + if (!strcmp(name, SYSTEM_DOS_ATTRIB)) { + if (!buffer) { + err = sizeof(u8); + } else if (size < sizeof(u8)) { + err = -ENODATA; + } else { + err = sizeof(u8); + *(u8 *)buffer = (u8)(le32_to_cpu(ni->flags) & 0x3F); + } + goto out; + } + + if (!strcmp(name, SYSTEM_NTFS_ATTRIB) || + !strcmp(name, SYSTEM_NTFS_ATTRIB_BE)) { + if (!buffer) { + err = sizeof(u32); + } else if (size < sizeof(u32)) { + err = -ENODATA; + } else { + err = sizeof(u32); + *(u32 *)buffer = le32_to_cpu(ni->flags); + if (!strcmp(name, SYSTEM_NTFS_ATTRIB_BE)) + *(__be32 *)buffer = cpu_to_be32(*(u32 *)buffer); + } + goto out; + } + + mutex_lock(&ni->mrec_lock); + err = ntfs_get_ea(inode, name, strlen(name), buffer, size); + mutex_unlock(&ni->mrec_lock); + +out: + return err; +} + +static int ntfs_new_attr_flags(struct ntfs_inode *ni, __le32 fattr) +{ + struct ntfs_attr_search_ctx *ctx; + struct mft_record *m; + struct attr_record *a; + __le16 new_aflags; + int mp_size, mp_ofs, name_ofs, arec_size, err; + + m = map_mft_record(ni); + if (IS_ERR(m)) + return PTR_ERR(m); + + ctx = ntfs_attr_get_search_ctx(ni, m); + if (!ctx) { + err = -ENOMEM; + goto err_out; + } + + err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len, + CASE_SENSITIVE, 0, NULL, 0, ctx); + if (err) { + err = -EINVAL; + goto err_out; + } + + a = ctx->attr; + new_aflags = ctx->attr->flags; + + if (fattr & FILE_ATTR_SPARSE_FILE) + new_aflags |= ATTR_IS_SPARSE; + else + new_aflags &= ~ATTR_IS_SPARSE; + + if (fattr & FILE_ATTR_COMPRESSED) + new_aflags |= ATTR_IS_COMPRESSED; + else + new_aflags &= ~ATTR_IS_COMPRESSED; + + if (new_aflags == a->flags) + return 0; + + if ((new_aflags & (ATTR_IS_SPARSE | ATTR_IS_COMPRESSED)) == + (ATTR_IS_SPARSE | ATTR_IS_COMPRESSED)) { + pr_err("file can't be sparsed and compressed\n"); + err = -EOPNOTSUPP; + goto err_out; + } + + if (!a->non_resident) + goto out; + + if (a->data.non_resident.data_size) { + pr_err("Can't change sparsed/compressed for non-empty file\n"); + err = -EOPNOTSUPP; + goto err_out; + } + + if (new_aflags & (ATTR_IS_SPARSE | ATTR_IS_COMPRESSED)) + name_ofs = (offsetof(struct attr_record, + data.non_resident.compressed_size) + + sizeof(a->data.non_resident.compressed_size) + 7) & ~7; + else + name_ofs = (offsetof(struct attr_record, + data.non_resident.compressed_size) + 7) & ~7; + + mp_size = ntfs_get_size_for_mapping_pairs(ni->vol, ni->runlist.rl, 0, -1, -1); + if (unlikely(mp_size < 0)) { + err = mp_size; + ntfs_debug("Failed to get size for mapping pairs array, error code %i.\n", err); + goto err_out; + } + + mp_ofs = (name_ofs + a->name_length * sizeof(__le16) + 7) & ~7; + arec_size = (mp_ofs + mp_size + 7) & ~7; + + err = ntfs_attr_record_resize(m, a, arec_size); + if (unlikely(err)) + goto err_out; + + if (new_aflags & (ATTR_IS_SPARSE | ATTR_IS_COMPRESSED)) { + a->data.non_resident.compression_unit = 0; + if (new_aflags & ATTR_IS_COMPRESSED || ni->vol->major_ver < 3) + a->data.non_resident.compression_unit = 4; + a->data.non_resident.compressed_size = 0; + ni->itype.compressed.size = 0; + if (a->data.non_resident.compression_unit) { + ni->itype.compressed.block_size = 1U << + (a->data.non_resident.compression_unit + + ni->vol->cluster_size_bits); + ni->itype.compressed.block_size_bits = + ffs(ni->itype.compressed.block_size) - + 1; + ni->itype.compressed.block_clusters = 1U << + a->data.non_resident.compression_unit; + } else { + ni->itype.compressed.block_size = 0; + ni->itype.compressed.block_size_bits = 0; + ni->itype.compressed.block_clusters = 0; + } + + if (new_aflags & ATTR_IS_SPARSE) { + NInoSetSparse(ni); + ni->flags |= FILE_ATTR_SPARSE_FILE; + } + + if (new_aflags & ATTR_IS_COMPRESSED) { + NInoSetCompressed(ni); + ni->flags |= FILE_ATTR_COMPRESSED; + } + } else { + ni->flags &= ~(FILE_ATTR_SPARSE_FILE | FILE_ATTR_COMPRESSED); + a->data.non_resident.compression_unit = 0; + NInoClearSparse(ni); + NInoClearCompressed(ni); + } + + a->name_offset = cpu_to_le16(name_ofs); + a->data.non_resident.mapping_pairs_offset = cpu_to_le16(mp_ofs); + +out: + a->flags = new_aflags; + mark_mft_record_dirty(ctx->ntfs_ino); +err_out: + if (ctx) + ntfs_attr_put_search_ctx(ctx); + unmap_mft_record(ni); + return err; +} + +static int ntfs_setxattr(const struct xattr_handler *handler, + struct mnt_idmap *idmap, struct dentry *unused, + struct inode *inode, const char *name, const void *value, + size_t size, int flags) +{ + struct ntfs_inode *ni = NTFS_I(inode); + int err; + __le32 fattr; + + if (NVolShutdown(ni->vol)) + return -EIO; + + if (!strcmp(name, SYSTEM_DOS_ATTRIB)) { + if (sizeof(u8) != size) { + err = -EINVAL; + goto out; + } + fattr = cpu_to_le32(*(u8 *)value); + goto set_fattr; + } + + if (!strcmp(name, SYSTEM_NTFS_ATTRIB) || + !strcmp(name, SYSTEM_NTFS_ATTRIB_BE)) { + if (size != sizeof(u32)) { + err = -EINVAL; + goto out; + } + if (!strcmp(name, SYSTEM_NTFS_ATTRIB_BE)) + fattr = cpu_to_le32(be32_to_cpu(*(__be32 *)value)); + else + fattr = cpu_to_le32(*(u32 *)value); + + if (S_ISREG(inode->i_mode)) { + mutex_lock(&ni->mrec_lock); + err = ntfs_new_attr_flags(ni, fattr); + mutex_unlock(&ni->mrec_lock); + if (err) + goto out; + } + +set_fattr: + if (S_ISDIR(inode->i_mode)) + fattr |= FILE_ATTR_DIRECTORY; + else + fattr &= ~FILE_ATTR_DIRECTORY; + + if (ni->flags != fattr) { + ni->flags = fattr; + if (fattr & FILE_ATTR_READONLY) + inode->i_mode &= ~0222; + else + inode->i_mode |= 0222; + NInoSetFileNameDirty(ni); + mark_inode_dirty(inode); + } + err = 0; + goto out; + } + + mutex_lock(&ni->mrec_lock); + err = ntfs_set_ea(inode, name, strlen(name), value, size, flags, NULL); + mutex_unlock(&ni->mrec_lock); + +out: + inode_set_ctime_current(inode); + mark_inode_dirty(inode); + return err; +} + +static bool ntfs_xattr_user_list(struct dentry *dentry) +{ + return true; +} + +// clang-format off +static const struct xattr_handler ntfs_other_xattr_handler = { + .prefix = "", + .get = ntfs_getxattr, + .set = ntfs_setxattr, + .list = ntfs_xattr_user_list, +}; + +const struct xattr_handler * const ntfs_xattr_handlers[] = { + &ntfs_other_xattr_handler, + NULL, +}; +// clang-format on + +#ifdef CONFIG_NTFS_FS_POSIX_ACL +struct posix_acl *ntfs_get_acl(struct mnt_idmap *idmap, struct dentry *dentry, + int type) +{ + struct inode *inode = d_inode(dentry); + struct ntfs_inode *ni = NTFS_I(inode); + const char *name; + size_t name_len; + struct posix_acl *acl; + int err; + void *buf; + + buf = kmalloc(PATH_MAX, GFP_KERNEL); + if (!buf) + return ERR_PTR(-ENOMEM); + + /* Possible values of 'type' was already checked above. */ + if (type == ACL_TYPE_ACCESS) { + name = XATTR_NAME_POSIX_ACL_ACCESS; + name_len = sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1; + } else { + name = XATTR_NAME_POSIX_ACL_DEFAULT; + name_len = sizeof(XATTR_NAME_POSIX_ACL_DEFAULT) - 1; + } + + mutex_lock(&ni->mrec_lock); + err = ntfs_get_ea(inode, name, name_len, buf, PATH_MAX); + mutex_unlock(&ni->mrec_lock); + + /* Translate extended attribute to acl. */ + if (err >= 0) + acl = posix_acl_from_xattr(&init_user_ns, buf, err); + else if (err == -ENODATA) + acl = NULL; + else + acl = ERR_PTR(err); + + if (!IS_ERR(acl)) + set_cached_acl(inode, type, acl); + + kfree(buf); + + return acl; +} + +static noinline int ntfs_set_acl_ex(struct mnt_idmap *idmap, + struct inode *inode, struct posix_acl *acl, + int type, bool init_acl) +{ + const char *name; + size_t size, name_len; + void *value; + int err; + int flags; + umode_t mode; + + if (S_ISLNK(inode->i_mode)) + return -EOPNOTSUPP; + + mode = inode->i_mode; + switch (type) { + case ACL_TYPE_ACCESS: + /* Do not change i_mode if we are in init_acl */ + if (acl && !init_acl) { + err = posix_acl_update_mode(idmap, inode, &mode, &acl); + if (err) + return err; + } + name = XATTR_NAME_POSIX_ACL_ACCESS; + name_len = sizeof(XATTR_NAME_POSIX_ACL_ACCESS) - 1; + break; + + case ACL_TYPE_DEFAULT: + if (!S_ISDIR(inode->i_mode)) + return acl ? -EACCES : 0; + name = XATTR_NAME_POSIX_ACL_DEFAULT; + name_len = sizeof(XATTR_NAME_POSIX_ACL_DEFAULT) - 1; + break; + + default: + return -EINVAL; + } + + if (!acl) { + /* Remove xattr if it can be presented via mode. */ + size = 0; + value = NULL; + flags = XATTR_REPLACE; + } else { + value = posix_acl_to_xattr(&init_user_ns, acl, &size, GFP_NOFS); + if (!value) + return -ENOMEM; + flags = 0; + } + + mutex_lock(&NTFS_I(inode)->mrec_lock); + err = ntfs_set_ea(inode, name, name_len, value, size, flags, NULL); + mutex_unlock(&NTFS_I(inode)->mrec_lock); + if (err == -ENODATA && !size) + err = 0; /* Removing non existed xattr. */ + if (!err) { + __le16 ea_size = 0; + umode_t old_mode = inode->i_mode; + + inode->i_mode = mode; + mutex_lock(&NTFS_I(inode)->mrec_lock); + err = ntfs_ea_set_wsl_inode(inode, 0, &ea_size, NTFS_EA_MODE); + if (err) { + ntfs_set_ea(inode, name, name_len, NULL, 0, + XATTR_REPLACE, NULL); + mutex_unlock(&NTFS_I(inode)->mrec_lock); + inode->i_mode = old_mode; + goto out; + } + mutex_unlock(&NTFS_I(inode)->mrec_lock); + + set_cached_acl(inode, type, acl); + inode_set_ctime_current(inode); + mark_inode_dirty(inode); + } + +out: + kfree(value); + + return err; +} + +int ntfs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry, + struct posix_acl *acl, int type) +{ + return ntfs_set_acl_ex(idmap, d_inode(dentry), acl, type, false); +} + +int ntfs_init_acl(struct mnt_idmap *idmap, struct inode *inode, + struct inode *dir) +{ + struct posix_acl *default_acl, *acl; + int err; + + err = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl); + if (err) + return err; + + if (default_acl) { + err = ntfs_set_acl_ex(idmap, inode, default_acl, + ACL_TYPE_DEFAULT, true); + posix_acl_release(default_acl); + } else { + inode->i_default_acl = NULL; + } + + if (acl) { + if (!err) + err = ntfs_set_acl_ex(idmap, inode, acl, + ACL_TYPE_ACCESS, true); + posix_acl_release(acl); + } else { + inode->i_acl = NULL; + } + + return err; +} +#endif -- cgit v1.3.1